Heat-insulating device for cooking utensils



Dm, 30 1930 c. ENDoRF 1,786,562

HEAT INSULATING DEVICE FOR CCOKING UTENSILS` Filed Aug. 17,- 1927 Cir Patented Dec. 3l), 1930 CHARLES ENDORF, OF CHICAGO, ILLINOIS HEAT-INSULATING DEVICE FOR COOKING UTENSILS Application filed August 17, 1927.

5, or the like.

@ne objectof the present invention is to provide a heat insulating device which may be readily positoned between a cooking utensil or the like and a heating element, such,

10 for example, as an electric grill or the burner of a gas stove, and which may be conveniently manipulated to move the utensil away from the heating element.

Another object of the invention Yis to' providey a heat insulating device wherein the insulating qualities oi" the device may be readily increased if desired.

Another object of the invention is to provide an insulating device having a plurality of elements'so related that they may be conveniently manipulated in a manner to separate the elements with respect to each other to provide an air space therebetween.

A further obj ect of the invention is to provide an insulating device having a plurality ot plates adapted to be positioned with respectte each other in a Ymanner to provide, ii'ieiiect, a single laminated heat insulating unit, the laminations of which may be conh4 veniently separated to provide a plurality of heat'" insulating mediums between a cooking utensil and a heating element.

Aistill further object of the invention is to provide a .device which is practical, of

simple, eiiicient and durable construction,v and which may be economically manufactured.

One embodiment of the invention is shown, for illustrative purposes, in the accompanying drawings, in whichu Fig. 1 is a plan view of the device snowing one of the members as having a portion thereot' broken away to disclose another member, and shifted to 'a` changed position indicated by dotted lines.

Fig. 2 is a side elevationof the parte shown in Fig. l.

Fig. 3 is a side elevation of the parts shown in Figs.' l and 2, illustrating the manner of separating certain portions of the device to Serial No, 213,487.

provide a heat insulating air space therebetween, and showing the parts in the positions occupied when a portion of the device is shifted to the dotted line position of Fig. l.

Fig. l is a sectional elevation taken on the line 4 4 of Fig. l.

Fig. 5 is a sectional elevation taken on the line 5 5 of Fig. l showing various portions ofthe device in changed position.

Fig. 6 is a sectional elevation taken on the line 6-6 of Fig. 2.

In the illustrative embodiment of the device shown in the drawing, a pair oi plates or discs, constructed preferably oli sheet metal, are provided, the upper plate being designated by the numeral l0, and the lower plate by the numeral ll. hose plates i0 and ll are shown provided at or near their central portions with apertures l2 and 13, respectively, the material of the upper plate l0 surrounding the aperture l2 being bent downwardly to form a depression adapted to receive the head le of a pivot member l5 in a manner to permit the top ot' the head le to lie ilush with the upper surface o' the plate l0, and the material of the lower plate ll surrounding the aperture i8 being bent downwardly to form a depression adapted to reeeive the downwardly bent portion 01"' the upper plate i() in a manner to permit said plates to lie closely adjacent each other. rlhe member l5 extends 'through the apertures l2 and 13 and is provided at its lower end with an enlarged portion 16 sun'iciently spaced from the downwardly bent portion oi the plate ll to permit of a limited movement of the plates ll and l2 with respect to each other longitudinally et the pivot member l5. The plates lO and ll are provided also with radially extending handles l? and 18, respectively, by which the device may be handled, and by which the respective plates l() and ll maybe shifted angularly with rest-ect to each other about the pivot member l5, as indicated by dotted lines in F ig. l. The handle 17, in the present instance, is shown seated in a depression formed adjacent the edge or the plate l0` in a manner to permit the top of the handle 17 to lie flush with the upper surtace ot the plate 10, and a depression termed lil in the upper 'face of the plate l is adapted to 1 L receive the depressed maro'nal portion ot the plate l0 in a manner to i ermit lose t( faces ot the pla"e to lie c "i or in contact with cach other, wl lie th d e i L in it they may be otherwise scoured, or. if desired, may be 'Formed integrallv with the plates.

To provide means for porn i to lie closely adjacent, ii. other, and for separ with respect to cach othfei the pivot member l5, tl

provided, in the pres nt in ality of radially disposed r portions 2l pr ssed dovnv, material of the plate in a ni"- clined depressions lr recesses ii ta ce thereof, while the upper pie vided with a plurality ot si 22 pressed downwardly from the material or' the plate in a manner to torni inclined lues on the lower face ot' 'the plate, the lugs or portions Q2 ot' the plate l() being so positioned therein that when the handles l? and 18 ot the respective plates ano the depressed portions at the margins of the plates are in the same vertical plane, the or 1o ti .ns 22 on the lower tace ott' the plate l0 will register with and occui p-os- .ion in the recesaes depressions 'tornied in the portions 2l of the plate ll, thereby permitting; the adjacent faces of the respective plat to lie closely adjacent or in contact with ach other and providing, in eitl'ect, a single ami l d heat insulating unit adapted to be tween a heating` element and L. p insil, and in which the upper tace thereof presents a smooth or hush surface l to the bottom of the utensil. thereby prov'ding stability in the seating of the utensil on the device.

The plates l() and ll, when in the relationship above described, provide a certain degree of insulation between the heating element and the utensil, but it will be understood, however, that the heat attained by the lower plate l1 will be quite readily transmitted to the upper plate l0, by reason of the close proximity of the plates, and thence to the utensil.

In the event that it becomes desirable to provide greater insulation between the heating element and the utensil, as would be the case when food or other substances in the course ot.' preparation had attained the desired condition induced by its subjection to the heat, and it was desirable to maintain substantially the degree of heat attained by the food or other substances without further heating, the plates l0 and ll may be separated from each other in a manner to provide an air space therebetween, it being Well l-:nown that air space one of the most elticient non-conductors ot' heat or cold.

To accomplish the separation of the plates and provide the air space, as above described, the plates i() and ll, and their respective handles i? a nd 18 may be shifted with respect to i lh other, as, tor i;ainple, in the present inst tice, the handle l? and plate 10 may be rotatec angnlarly with respect to the handle 18 i id plate 'll about the pivot member lo, thereby carrying the lugs or portions 9.2 up the inclined surfaces of the depressions or 'ecesses formed in the downwardly pressed portions 2l., and onto the upper surface of the plate ll., a is separating the plates l() and ll and proline,- a space therebetween through which the air may circulV te, thereby reducing, to a very considerable degree, the transmission ot' heat 'trom the heating element to the utensil.

lt will be observed from the foregoing description that the present invention provides Y a practicable, eiiicient durable and economically constructed heat insulating device, capable of being easily and conveniently manipulated, and wherein, by reason of the handles l and 18 extending outwardly trom beneath the utensil, the various parts of the device may be adj usted to provide desirable insulation without the necessity of removing` 'the utensil from the device, as, it will be understood that as the plate l0 is lifted trom the plate ll by reason ot the cammingj action between the inclined lugs 22 and the inclined surfaces of the depressions or recesses 'Formed in the portions 2l, the utensil resting on the plate l0 will. he lifted with the plate.

(ll mialslv, the present invention not limited to the precise details of construction shown and described, but ina-y be variously inodii'ied. Moreover, all the features of the invention need not be used conjointly, as the sane may be usedto advantage in variously different combinations and sub-combinations.

lVhat I claim as my invention and desire to sec ire by Letters Patent is:

l. A device of the class described, coinprising a. plurality oi rotatably related plates, one of said plates having,` a plurality ot annularly spaced depressions Jformed therein. a plurality of annularly spaced lugs formed on the other of said plates and adapted to register with said depressions in a manner to permit the adjacent faces, of said plates to contact each other a pivot member operatively related to and connected with said plates, and means associated with said plates for relatively shifting the plates angularly With respect to each other in a manner to move said lugs out of said depressions for separating the adjacent faces of said plates and providing an air space therebetween.

2. A device of the class described, comprising a plate having a pluralitT of annularly spaced depressions formed therein, a second plate having a plurality of annularly spaced lugs vformed thereon and Y adapted to register with said depressions in a manner to permit the adjacent faces of said pla-tes to lie in close proximity to each other, an elongated pivot member connecting the said plates adjacent their central portions, said plates having depressions formed therein adjacent their edge portionsI and adapted to register with each other when said lugs are in reistry With said annularly spaced depressions, and means carried by said plates for moving the plates angularly ivith respect to each other about said pivot member in a manner to-move said lugs out of register with said first mentioned depressions and on to the face of said first mentioned plate, there- =by separating the adjacent faces of said plates and providing an air space therebetvveen.

3. A device of the class described, comprising a. sheet metal plate having a plurality of radially disposed uniformly spaced depressions formed in the upper face thereof, a second sheet metal plate having a plurality of radially disposed uniformly spaced lugs formed on its lovver face and adapted t0 register with said depressions in a manner to permit the adjacent faces of said plates to contact each other, an elongated pivot member connecting said plates adjacent their central portions, said plates having radially extendino' depressions formed therein adjacent their edge portions and adapted to register with each other when said lugs are in register with said radially disposed uniformly spaced depressions, and handles carried by said plates and projecting radially from said radially extending depressions for moving the plates angularly with respect to each other about said pivot member in a manner to miove said lugs out of register With said first mentioned depressions and on to the face of said first mentioned plate, thereby separating the adjacent faces of the plates and providing an air space therebetween.

Ll. A heat insulating device for cooking utensils comprising a plurality of co-operably related plates, means for permanently connecting said plates together to have pivotal relation Witheach other, one of said plates having a plurality of recesses formed therein, a plurality of lugs carried by the other of said plates and adapted to engage said recesses in a manner to permit the adjacent faces of said plates to substantially contact With each other in one position of adjustment, and means associated With said plates for relatively shifting the plates With respect to each other in a manner to move said lugs out of said recesses whereby to separate the adjacent faces of said plates and providing an airspace therebetween in other positions of adjustment.

5. A heat insulating device for cooking utensils comprising a plurality of plates having corresponding recesses and projections formed on their adjacent faces for permitting said plates to lie close to each other, there being co-operating angular surfaces adjacent said corresponding recesses and projections whereby when said plates are shifted in relation to each other a ivedging action will occur to separate said plates, a pivot member operatively related to and connecting said plates whereby they may have pivotal movement in relation to each other, and means carried by said plates and extending radially therefrom and adapted to be grasped by an operator for shifting said plates about said pivotal member relatively of each other in a manner to separate the plates when desired to provide an air space therebetween.

ln testimony whereof I have signed my name to this specification, on this 9th day of August, A. l). 1927. l

CHARLES ENDORF.

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